526 PROFESSOR GREGORY ON 
and lateral segments approaching in form to those of 4. granulata. But on care- 
ful comparison, it seems very doubtful whether this form do not belong to a dif- 
ferent species. As I have not yet had time to ascertain this precisely, I give it 
here cum nota. 
A. granulata is tolerably frequent in the Loch Fine dredging I have named as 
being so rich in species of Amphora, especially of complex Amphore. I would 
observe that in this form the striation of the lateral segments is finer than that 
on the middle bars, whereas in the next species the reverse is the case. A. 
granulata sometimes attains a considerably larger size than in the two un- 
doubted specimens here figured. 
97. Amphora cymbifera, n. sp. Pl. XIV., figs. 97, 97 b, 97 c. Form of frus- 
tule elliptic, rather broad, with very short, produced, and truncate apices. Length 
00025" to 0:0045’; breadth in the middle, 0°0012 to 00016". Lateral segments 
highly arcuate on the dorsal, almost straight on the ventral margin, the former 
being suddenly contracted at the ends, so as to produce round heads, with very 
short necks; thus the segments are capitate. Their form is elongated, and the 
curve regular and graceful. They are marked by somewhat coarse striz, slightly 
inclined. Strize about 22 in 0-001". The nodules are on the inner margin, or 
just within it, and the inner lines are parallel to that margin, and close to it. 
The segments, when detached, as is seen in one of the figures, exactly resemble 
the frustules of an elegant Cymbella. Between the lateral segments lie from five 
to seven convergent bars, and, in one focus, the whole frustule is seen to be made 
up of these bars (fig. 96 )), which are marked by fine transverse strize, consider- 
ably finer than those on the lateral segments, which became stronger and coarser 
near the margin, as may be seen by the figures. The bars, as in A. sulcata (fig. 
91), appear to be separated by furrows, and in a certain focus these furrows may 
be seen marked by lines of short transverse striz. Fig. 96 is the same frustule 
as that in 96 6, focussed so as to show the lateral segments. Fig. 96 ¢, is a de- 
tached segment. 
This fine form is not unfrequent in the Loch Fine dredging above mentioned. 
The views of it are so different, according to its position, and the detached seg- 
ments are so like Cymbelle, that it was some time before I could see my way 
among these forms, especially mixed as they were with frustules and segments 
of the preceding, as well as of the next species, which have a similar structure. 
98. Amphora proboscidea,n. sp. Pl. XIV., figs. 98; 986; 98¢; 98d. Form 
of frustule nearly rectangular in the middle, contracted near the ends to truncate 
extremities. Length from 0-003” to 0:005"; breadth from 0:001’ to 0:0015". The 
longer specimens are narrower than those of middling length. Lateral seg- 
ments arcuate on the dorsal, often slightly convex, or undulated, on the ventral 
surface, contracted at the ends so as to be capitate, the heads having longer necks 
than in the preceding species, which are bent forward at a very obtuse angle, 
